Bruce Jenner has undergone breast implant surgery, a huge step in his transformation to a woman, a bombshell report claims.

The Olympic hero had the procedure done “a few weeks ago” and didn’t go overboard on the new rack, says RadarOnline.

“He went with a smaller implant because he didn’t want to look ridiculous,” a source close to Jenner told the website.

Jenner could still opt for larger breasts after his “full gender reassignment surgery,” which is expected to take place in May or June.

The radical surgery has severely limited Jenner’s movements, but he’s making the best of the situation.

“Recovery hasn’t been difficult, but Bruce has had to sleep in a recliner to help with the healing,” the Radar source said. “He’s not allowed to lift anything, and he has to wear a bra 24/7, but he’s expected to resume normal activities in the next six weeks.”

Jenner’s gradual gender transition has taken an emotional toll on the 1976 decathlon gold medalist, but he believes it’ll be worth it in the end.

“He has been emotional, but finally feels like this is the body he was meant to have,” the source said.

Jenner’s reps could not be immediately reached for comment Tuesday morning.

“While the exact nature of Jenner’s gender transition remains unconfirmed, and it’s possible he either has or will be undergoing hormone treatments that could affect his body, the Olympic hero has NOT had a surgical procedure to enlarge his breasts,” says the site.